Home / 20,429.48-30,636.66-7,278.36

Finding the Fourth Proportional to 20,429.48, 30,636.66 and 7,278.36

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Solution

The fourth proportional to 20,429.48, 30,636.66 and 7,278.36 is: 10,914.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.48 : 30,636.66 = 7,278.36 : x
  2. Step 2: Convert to fraction form
    20,429.48/30,636.66 = 7,278.36/x
  3. Step 3: Cross multiply
    20,429.48x = 30,636.66 × 7,278.36
  4. Step 4: Simplify right side
    20,429.48x = 222,984,640.68
  5. Step 5: Solve for x
    x = 222,984,640.68/20,429.48
  6. Step 6: Final answer
    x = 10,914.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.